mie: implement instruction selection graph generation for binary ops and load/store

mie/select/ptr.c

@@ -0,0 +1,85 @@
+#include "builder.h"
+
+#include <mie/ctx.h>
+#include <mie/ir/ptr.h>
+#include <mie/select/graph.h>
+
+static enum mie_status push_load(
+	struct mie_select_builder *builder, struct mie_instr *instr)
+{
+	struct mie_select_graph *graph = mie_select_builder_get_graph(builder);
+	struct mie_load *load = (struct mie_load *)instr;
+
+	struct mie_select_value *chain
+		= select_builder_get_mem_access(builder, load->l_src);
+	if (!chain) {
+		chain = &graph->g_entry;
+	}
+
+	struct mie_select_value *operands[] = {
+		chain,
+		select_builder_get_value(builder, load->l_src),
+	};
+	size_t nr_operands = sizeof operands / sizeof operands[0];
+
+	struct mie_type *result[] = {
+		load->l_type,
+		mie_ctx_get_type(mie_select_builder_get_ctx(builder), MIE_TYPE_OTHER),
+	};
+	size_t nr_results = sizeof result / sizeof result[0];
+
+	struct mie_select_value node = {0};
+	enum mie_status status = mie_select_graph_get_node(
+		graph, MIE_SELECT_OP_LOAD, operands, nr_operands, result,
+		nr_results, &node);
+	if (status != MIE_SUCCESS) {
+		return status;
+	}
+
+	select_builder_set_mem_access(builder, load->l_src, &node);
+	return select_builder_set_value(builder, MIE_VALUE(instr), &node);
+}
+
+static enum mie_status push_store(
+	struct mie_select_builder *builder, struct mie_instr *instr)
+{
+	struct mie_store *store = (struct mie_store *)instr;
+	struct mie_select_graph *graph = mie_select_builder_get_graph(builder);
+
+	struct mie_select_value *chain
+		= select_builder_get_mem_access(builder, store->s_dest);
+	if (!chain) {
+		chain = &graph->g_entry;
+	}
+
+	struct mie_select_value *operands[] = {
+		chain,
+		select_builder_get_value(builder, store->s_val),
+		select_builder_get_value(builder, store->s_dest),
+	};
+	size_t nr_operands = sizeof operands / sizeof operands[0];
+
+	struct mie_type *result[] = {
+		mie_ctx_get_type(mie_select_builder_get_ctx(builder), MIE_TYPE_OTHER),
+	};
+	size_t nr_results = sizeof result / sizeof result[0];
+
+	struct mie_select_value node = {0};
+	enum mie_status status = mie_select_graph_get_node(
+		graph, MIE_SELECT_OP_STORE, operands, nr_operands, result,
+		nr_results, &node);
+	if (status != MIE_SUCCESS) {
+		return status;
+	}
+
+	select_builder_set_mem_access(builder, store->s_dest, &node);
+	return select_builder_set_value(builder, MIE_VALUE(instr), &node);
+}
+
+struct select_instr_type select_load = {
+	.i_push = push_load,
+};
+
+struct select_instr_type select_store = {
+	.i_push = push_store,
+};